DDR3 is RAM SLOTS.The rest depends on what you want to accomplish.And what type of devices you will installIf you have any SATA in mind you might need an installer.It's not easy.A basic just get by with the internet and not classy gamesthe less you need to spend.They should be described a Gamers if they are.The other items items should be detailed in the stats.Note : A SATA port only connects 1 hard drive or device.